28 enero 2015
Earth’s magnetic field shields the life on our planet’s surface from cosmic rays. It is generated by turbulent motions of liquid iron in Earth’s core. Iron is a metal, which means it can easily conduct a flow of electrons. New findings show that a missing piece of the traditional theory explaining why metals become less conductive when they are heated was needed to complete the puzzle of this field-generating process.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/Q4W7kYe2s-g/150128141651.htm
